IOmeter v/s FIO on Windows VM

I have a Windows VM which have disks on high performance storage. I have both FIO(http://bluestop.org/fio/) and IOmeter(http://www.iometer.org/) installed on it. I want to be able to saturate the disks to obtain max IOPs through FIO, but I see that FIO is not reaching the IOmeter IOPs level(FIO is showing around 100k IOPs lesser than IOmeter).

IOmeter config:

• 1 worker per disk (8 disks)
• 64 oio on each worker
• 4k random writes
• 4kb akigned IOs

FIO config:

[global]
rw=randread
rwmixread=100
blocksize=4096
ioengine=windowsaio
group_reporting=1
iodepth=64
description=fio 4KB random read 8disk
time_based=1
runtime=300
direct=1
numjobs=8

[fio-job-01]
filename=\\.\PhysicalDrive1
[fio-job-02]
filename=\\.\PhysicalDrive2
[fio-job-03]
filename=\\.\PhysicalDrive3
[fio-job-04]
filename=\\.\PhysicalDrive4
[fio-job-05]
filename=\\.\PhysicalDrive5
[fio-job-06]
filename=\\.\PhysicalDrive6
[fio-job-07]
filename=\\.\PhysicalDrive7
[fio-job-08]
filename=\\.\PhysicalDrive8

Is there something that I can add in my FIO config to improve the IOPs?

Thanks.